Gas-heating device for printing presses



March 24, 1925. 1,530,932

c. H. COCHRANE GAS HEATING DEVICE FOR PRTNTING PRESSES Filed June 20, 1923 2 Sheets-Sheet l LF Ji 0 lll INVENTOR. @Lw/Q1 W @www March Z4., 1925.

C. H. COCHRANE GAS HEATING DEVICE FOR PRTNTING PRESSES Filed June 20, 1925 2 Sheets-Sheet 2 path of the the row of flame. This method UNITED STATES 1,530,932 PATENT OFFICE.

CHARLES H. COCHRANE, 0F NEW YORK, N. Y.

GAS-EATING DEVICE FO'R PRINTING PRESSES. y

Application l'ed `Tune 20, '1923.-

To all whom z't may concern.

Be it known that I, CHARLES H. COCH- RANE, a citizen of the` United States, and resident of New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Gas-Heatin Devices for Printing Presses, of whic the following is a specili-4v cation.

In applying gas heat to printing presses it has been customary to use an iron-pipe, with a row of uniform size flame-holes, such gas pipe extending across and below the paper, so that when the freshly printed sheet or web of paper was moved along it passed close above or right through of course involved much danger of paper-burning, to overcome which a number of automatic cutoffs have been invented to shut ofi' the gas when the printing. press stopped, and relight it .automatically when the press started again, through the medium of a pilot light. Such mechanism are .shown in my own Pattent, No. 1,414,399, in Smiths Patent, N0. 1,286,132, in Garlings Patent, No. 1,413,719, and in others that are well known. v

In practice, each of these devices has some drawbacks, and paper-burning is common in the pressrooms where they are used. To overcome these diiculties, I have devised a form of heating apparatus that gives much increased safet and at the same time permits more heat to be transferred to the paper, when desired.

I make a refiecting above instead of below sheets or paper-web, in the printing press, or its extension ordeliveryboard, andY by employing two parallel rows of flame-holes in the gas pipe, and directing theflame against a broad steel shield, I am able to produce a far wider area or zone of heat through which the sheet passes, and withouteXposing the sheet directly tothe flames.

But to make the mechanism doubly safe, and to save wasting gas I provide also an automatic gas cut-01T working on a novel principle; the pinching of a rubber tube. here are minor matters of'improved construction that will appear from the annexed drawings and description.

The objects of the invention are:

1. To increase safety in the use heat on printing presses;

2. To increase the heat available for raisgas heater, located of gas the freshly printed.

Serial No. 646,553.

ing the temperature of the paper, thus removing any charge of static electricity, and hastening the drying or setting of the ink;

3. To secure an even and uniform distribution of heat over the entire surface of the Paper;

4. To provide an improved and simpli-l fied gas cut-off, saving gas and still further increasing safety;

5. To provide a heater for a printing press, that is easily and quickly removable, adjustable to a great variety of positions, and quickly swung or slid out of the way when desired.

These and other objects I attain by the following described mechanism. f Referring to the accompanying drawings, in throughout the several drawings:

1g.. 1 represents a side elevation of the suspension.

Fig. 6- represents a perspective view of Vthe heater-pipe with the double parallel row of flame holes.

Fig. 7 represents a sectional side view of the gas cut-oli'.

Fig. 8 represents a cross-section along line 2-2 in F ig. 7.

Fig. 9 represents a cross-section along line 1-1 in Fig. 7

Fig. 10 represents a variant form of cutoli1 in cross-section.

No attempt is made to illustrate the mechanism heater is attached, or may be suspended over, as these are built in almost endless forms.

A is a te scopic standard for supporting the horizontal pipe support B, from which the heater proper is suspended by the arms C77 and CU The heater may be swun to any point in a circle from the standart by having the pipe elbow D. slightly loose. A1 is a circular base to be bolted to the licor. A2 is a telescopic pipe, and A3 a thumb screw to hold it in place. E is the cut-olf mechanism, shown which the letters refer to similar parts, l

of a printing press to which the Referring particularly to 1 and 2,-

. ing,

in detail in Figs. 7, 8, 9, and 10. The arms C and C1 are fixed on the pipe B by set screws F and F1. Ilie heater can be adjusted to right or left on the pipe B or it may be rotated to any desired angle. L is the freshly printed paper, such as is usually stacked a sheet at a time on the delivery board yofa printing press.

Referring to Figs. 3 and 4, the gas pipe G has two parallel rows of flame holes, which should be uniform in size and spacand preferably staggered, and so positioned with reference to the steel reflector H, that the steel surface serves as a baffle plate to spread the flame over the .entire under surface. In practice the shields should be rectangular, and 10 or more inches wide, affording an area of reflected heat below that will uniformly heat an entire sheet or web of paper. A web of paper passing under this'heater is exposed to the heat approximately twentyy times as long as one passing over the common type of open-flame gas pipe heater, which delivers a line of heat over about one half inch. TheV steel sheet reflector H has its edges I turned down at right angles, and one or more braces, as J, ar

used to stiften the structure.

In Fig. 4 the heater is shown suspended by telescopic arms from the ceiling.v Obviously it may also be raised and lowered by any suitable means known in practice. 'Fig'. 5 4shows a Variant method by which the heater may be attached to some convenient part of the printing ress, as K.

Referring to Figs 8, 9, and 10, 0, is a portion of the gas pipe, with two rows of flame holes, b is the casing of the attached cut-off, c is the end of a flexible gas tube, supplying gas fuel to the metal tube d, which is closed at its lower end; e is a short tube or nipple, connecting with d, on which an india rubber tube f is fitted. el is another short tube or nipple, connectiong with the othei' end of f, and terminating in a gas tip g, within the heater pipe a The lever of the eut-off mechanism is at 71:, and when the cut-off is open it will be understood that the gas flows uninterruptedly from the source through c, el, e, afs, new and ug, into can The level. ich, hinged to the casing at i, Fig. 9 has a vibrating movement, as indicated by the dot ted line j; when closed, as in Fig. 9it compresses and closes the india rubber tube f, against its support jl, lo is a screw and Z is a wire or cord for connecting the lever to a movable part of the printing press iis i m Thus the movement of the part m in the direction of the arrow (Fig. 9) may be utilized to close the cut-off and stop the flow of gas through the tip to the heater.

That the heater may be re-lighted autoin which the rubber tube ving down on the cut-oft' may be matically when the part m moves oppoi sitely to the arrow and turns the gas on again, a by-pass n is provided, which takes in gas continually at nl and delivers it at o, which being lit, constitutes a pilotlight for re-lighting the asand air mixture that flows out of the oles p, of the gas pipe heater; g is a hole in the nipple 1' (that joins the casing to the heater) to admit air, for mixing with ,the gas, on the well known Bunsen burner principle, this constituting an air mixer.

In the variant form of cut-0E (Fig. l0) a spiral spring s tends to lower the lever h, closing the gas aperture in f which may be opened Aby a pull on the wire l, through the movement of the press-part am.

' It will be observed that this is the reverse of the action'of the form shown in ig. 9, f, acts as a spring to hold up the lever in and the moving part m effects the closing by pulllever through the medium of the wire.

It is apparent that the lheater with this attached to any sort of printing press that has an available moving part for giving the desired pull to the wire at the desired time, and that the heater as a whole may be placed in a great variety of positions.

I do not wish to limit myself to the exact construction shown, it being apparent that there may be considerable variation in using the principle of universal adjustment without departing from the spirit of mylinvention, or that a plurality of gas pipes might be employed, or that a different form of cut-off may be desirable 0n particular styles of printing presses, etc.

What I claim is:

1. A. portable gas heater adjiistably mounted with reference to a printing press, in combination with a reflecting baille plate, for throwing heat upon freshly printed sheets, located or passing below said reflecting baille plate.

2. A portable gas heater adjustably mounted with reference to a printing press, in combination with a baffle plate or rectangular reflector for throwing heat on freshly printed sheets located or passing below, and an automatic cut-off for the gas supply.

3. A portable and adjustably mounted gas heater having a combined reflector and baffle plate, and a gas pipe with two parallel rows of flame holes, in combination with a printing press, for the purpose of drying freshly printed paper.

4. A rectangular reflector adapted to throw heat over the entire surface of sheets and means for Aflector, in combination with a gas supply, led through a gas pipe having two parallel rows of flame holes. y.

5. A portable and adjustable gas heater, in close 'relation to a printing press, said heater having a plurality of parallel rows of flame holes, in combination with a refleeting surface, for securing a broad area or zone of heat, as set forth.

6. A portable and adjustable gas heater, in close relation to a printing press, said heater having aplurality of parallel rows of flame holes, in combination with a refleeting surface, and with an automatic cutofl` for the gas, as set forth.

7. A portable and adjustable gas heater,

' in close `relation to a printing press, said heater having a plurality of parallel rows of flame holes, in combination with a reflecting surface, an automatic, cut-0H for the gas supply, and an air mixing device.

8. A portable gas heater, in close relation to a printing press, consisting of a metal pipe, with two parallel rows of flame holes, preferably staggered, in combination with a reflecting surface, the entire heater being adjustable as to position with relation to the freshly printed paper issuing from a printing press.

9. A reflecting gas heater, adjustably attached to a printing press, in combination with an air mixer, and a gas cut-off and a gas supply.

10. In combination with a printing press, a portably arranged reflecting gas heater, whose heat supply comes through a suitably arranged gas pipe, said gas pipe provided with a plurality of parallel rows of holes, for the purpose of drying freshly printed sheets issuing from said printing press.

11. 0n ay printing press, the combination of a portable and adjustable gas heater, a flexible 'rubber gas hose, and automatic means to control the flow of gas to the heater.

heater, in combination with a wire and some moving parts of the press, for operating the valve by a pull on the wire, as set forth.

13. In a printing press heater, the combination of wire connected to a movable part of the press, a flexible gas tube, and a lever adjusted to pinch said flexible gas tube,thus controlling the flow of gas fuel to the-heater.

14.-. In a portable and adjustable printing press heater, the combination of a gas supply, a. flexible tube, and automatically operated means for opening and closing the tube to control the lflow of gas.

15. In a printing press, the combination of an automatic cut-off, comprising a flex'- ible tube and a compression lever, said oompression lever connected by a cord or wire to and operated by a moving member of said printing press, and lsaid cut-off connected to a portably arranged gas heater, as set forth.

16. A -device for controlling the flow of gas fuel to a heater on a printing press in combination with a .flexible rubber tube,

and means for pinching the tube when the press stops, and releasing it when the press starts.

17. The combination of a. portable gas heater for printing presses with a gas fuel supply, a flexible tube for said gas supply, a pinching device located on said flexible tube, and means for utilizing the movement of the printing press to either open or close: said pinching device, as set forth.

18. In a portably arranged printing press heater, the combination of a, gas supply, a pilot light, a flexible tube, and means for opening and closing said tube i'n unison withthe stopping and starting of the press as set forth.

Signed at New York city in the county of New York, and State of New York, this fifteenth day of June, A. D. `1923.

CHARLES H. COCHRANE.

Witnesses:

WiLLIAM. NEUMANN, J. KAISERMAN. 

